//1. 寫(xiě)一個(gè)函數(shù),它的原形是int continumax(char *outputstr,char *intputstr)
//功能：
//在字符串中找出連續(xù)最長(zhǎng)的數(shù)字串，并把這個(gè)串的長(zhǎng)度返回，
//并把這個(gè)最長(zhǎng)數(shù)字串付給其中一個(gè)函數(shù)參數(shù)outputstr所指內(nèi)存。
//例如："abcd12345ed125ss123456789"的首地址傳給intputstr后，函數(shù)將返回9，outputstr所指的值為123456789
#include<stdio.h>
#include<assert.h>
int continumax(char *outputstr,char *inputstr)
{   
    assert(outputstr);
    assert(inputstr);
    int length = 0;
    int maxlength = 0; 
    int i = 0;
    int j = 0;
    while(inputstr[i] != '\0')
    {
        while( inputstr[i] >='0'&& inputstr[i] <= '9')
        {   
            length++;
            i++;
        }
        if(length > maxlength)
        {
            maxlength = length;
            int k = i-maxlength;
            for(j = 0; j < maxlength; j++ )
            {  

                outputstr[j] =inputstr[k++];

            }
            length = 0;
            continue;
        }
        i++;
        length = 0;
    }
        outputstr[j] = '\0';
        return maxlength;
}

 

int main( )
{   
    char inputstr[ ]= "abcd12345eddafsd125ss123456789";
    char outputstr[100];

    int max_numstr_length = continumax(outputstr,inputstr);
    printf("%s\n",outputstr);
    printf("the max_numstr_length is %d\n", max_numstr_length);
    return 0;
}

#include<iostream.h>
#include<malloc.h>

 
int continumax(char * outputstr, char * inputstr)
{
    int len = 0;        //統(tǒng)計(jì)數(shù)字字符串的長(zhǎng)度
    int max = 0;        //當(dāng)前最大數(shù)字字符串的長(zhǎng)度
    char *pstr =NULL;   //記錄最大數(shù)字字符的起始位置

 
    while(* inputstr!= '\0')
    {
        if(*inputstr <= '9' && *inputstr >='0')  //統(tǒng)計(jì)數(shù)字子字符串的長(zhǎng)度
        {
            len++;
            inputstr++;
            continue;
        }
        else if (len > max)        //如果統(tǒng)計(jì)出來(lái)的數(shù)字字符串大于當(dāng)前的最大數(shù)字子字符串的長(zhǎng)度，則更新
        {
            max = len;
            pstr = inputstr-len;      
            len = 0;
        }
        inputstr++;
    }
    for(int i = 0 ; i<max;i++)  //將最大子字符串的值拷貝給outputstr
    {
        *outputstr = *pstr;
        outputstr++;
        pstr++;
    }

       outputstr = outputstr-max;
       outputstr[max] ='\0';
       cout<<outputstr<<endl;

       return max;

     
}

int main()
{
    char input[] = "de1234de123456ed";
    //char * out = (char *)malloc(100*sizeof(char));
    char output[100];
    int max = continumax(output, input);
    cout<<max<<endl;
    return 0;
}